124 MUSCID.E. 



nescente-tomentosa, thorace nigro-quadrivittato, alis cinereis, maris basi 

 et antice vix fuscescentibus, abdomine cinereo nigro-quadrimacidato. 

 Long. 2-3 ; alar. 5-6 lin. 



Black, with grey tomentum. Head hoary. Thorax with four black 

 stripes. Wings grey, of the male very slightly brownish at the base and 

 in front ; cubital and praebrachial veins slightly diverging from the 

 praebrachial transverse vein to the border ; discal transverse vein ob- 

 lique, slightly undulating, parted by hardly more than its length from 

 the praebrachial transverse vein, and by less than its length from the 

 border. Alulae grey, with testaceous borders. Abdomen long-obco- 

 nical, with cinereous tomentum, as long as the thorax; second and 

 third segments with two black spots on each. 



Common. (E.) 



17. pallida,F.E.S.iv.320.33(1792); Gmel.; Fal.; Meig.; Mcq.; 

 Zett. testacea, D. G. Testacea, antennis articulo tertio apice fusco, 

 alis subcinereis, tarsis nigris. Long. 2| 3 ; alar. 5-6 lin. 



Testaceous. Head whitish in front ; third joint of the antennae 

 brownish at the tip. Wings slightly grey; cubital and praebrachial 

 veins diverging from the praebrachial transverse vein to the border; 

 discal transverse vein slightly oblique, very slightly undulating, parted 

 by a little more than its length from the praebrachial transverse vein, 

 and by less than its length from the border. Alulae whitish, with pale 

 testaceous borders. Abdomen subelliptical, as long and as broad as 

 the thorax. Tarsi black. Male. Discal transverse vein parted by about 

 its length or a little less from the praebrachial transverse vein, and 

 by a little less than its length from the border. Var. Thorax with 

 three short brown stripes. Wings slightly testaceous at the base and 

 in front. 



Not rare. (E.) 



18. Populi, Meig. Zw. v. 115. 55 (1826); Mcq.; Zeit.pallida 

 var., Fal. Nigra, canescente-tomentosa, palpis testaceis, thorace nigro- 

 quadrivittato, humeris scutello abdomine pedibusque fulvis, alis subci- 

 nereis basi subluridis,. venis cubitali et prcebrachiali apices versus diver- 

 gentibus, vena prabrachiali transversa non nebulosa, tarsis nigris. Long. 

 3-3i; alar. 6-7 lin. 



Block, with grey tomentum. Head white. Palpi testaceous. Thorax 

 with four black stripes. Humeri and scutellum tawny. Wings slightly- 

 grey, pale lurid at the base ; cubital and prcebrachial veins slightly di- 

 verging from the unclouded prcebrachial transverse vein to the border ; 

 discal transverse vein clouded with pale brown, a little oblique, slightly 

 undulating, parted by almost its length from the prcBbrachial transverse 

 vdn, and by little more than half its length from the border. Alulae 

 whitish, with pale testaceous borders. Abdomen tawny, subelliptical, 

 as long and as broad as the thorax. Legs tawny ; tarsi black. 



Common. (E.) 



